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4 years ago

Does anyone know the answer to these questions?

Mathematics

1 answer:

Sauron [17]4 years ago

3 0

Answer:

Step-by-step explanation:

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Solve the equation for 0

kondaur [170]

Answer:

????

Step-by-step explanation:

,$,$,$,$,$,$,#$,#,$,

3 0

4 years ago

A refrigerator costs $580 a year to run. A family purchases a new one for $1200 that will save them 22% annually in energy costs

NeTakaya

Answer:

It will take nine years and four months for the refrigerator to pay for itself.

Step-by-step explanation:

The new refrigerator which costs $1200, saves the family 22% annually in energy cost.

Since the old refrigerator costs $580 to run, we want to determine how many years it will take for 22% of $580 per year to make $1200.

22% of $580

= 580 × 0.22

= 127.6

That is, it saved then $127.6 per year.

Now,

$1200/127.6

≈ 9.4

Which means, it will take 9 years and 4 months for the refrigerator to pay for itself.

7 0

3 years ago

The following data reflect the number of customers who return merchandise for a refund on Monday. Note these data reflect the po

garri49 [273]

Answer:

The standard deviation of given data is 12.36

Step-by-step explanation:

We are given the following data in the question:

40, 12, 17, 25, 9, 46, 13, 22, 16,7

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n}}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{207}{10} = 20.7$

Sum of squares of differences =

372.49 + 75.69 + 13.69 + 18.49 + 136.89 + 640.09 + 59.29 + 1.69 + 22.09 + 187.69 = 1528.1

$\sigma = \sqrt{\dfrac{1528.1}{10}} = 12.36$

Thus, the standard deviation of given data is 12.36

8 0

3 years ago

I'll give brainiest whoever answers first

guapka [62]

aight slide it here big boy

6 0

3 years ago

The simplified form of an expression is 1/258 t^28. Which expression was simplified

Aleksandr-060686 [28]

<span>1/258 *(t^28)
= t^28 / 4^4
= t^28 4^-4
= (t^-7 * 4)^-4
= (4t^-7)^-4

answer is D. last option</span>

7 0

3 years ago

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